EP 1438631 B1 20060802 - COLOUR DISPLAY DEVICE
Title (en)
COLOUR DISPLAY DEVICE
Title (de)
FARBBILDANZEIGEVORRICHTUNG
Title (fr)
DISPOSITIF D'AFFICHAGE COULEUR
Publication
Application
Priority
- GB 0124247 A 20011010
- IB 0203752 W 20020912
Abstract (en)
[origin: US7106297B2] A color display device based on dielectrophoresis is described. The device includes a dielectrophoretic mixture comprising semi-insulating particles of each of the subtractive primary colors cyan ( 32 ), magenta ( 34 ) and yellow ( 36 ) in a semi-insulating liquid ( 24 ). The dielectrophoretic frequency characteristics of the particles are the same or similar for particles of the same color but different between the three colors. In particular, the transition frequency (f<SUB>0</SUB>) is different for each color, or two colors may have the same transition frequency (f<SUB>0</SUB>) if one has a reversed sense dielectrophoretic frequency characteristic. Also the speeds of the particles are the same for particles of the same color but different between the three colors. The pixels are driven with alternating voltages of different frequencies (f<SUB>1</SUB>, f<SUB>2</SUB>, f<SUB>3</SUB>, f<SUB>4</SUB>) and duration determined such that different proportions of the different colors of particles are moved, dependent upon their transition frequencies and speeds. A reflective, saturated full color display device may thereby be provided.
IPC 8 full level
G02F 1/1677 (2019.01); G09G 3/20 (2006.01); G09G 3/34 (2006.01); G02F 1/23 (2006.01); G09G 5/02 (2006.01)
CPC (source: EP KR US)
G02F 1/1677 (2019.01 - EP US); G02F 1/23 (2013.01 - KR); G09G 3/344 (2013.01 - EP KR US); G09G 5/02 (2013.01 - KR); G02F 1/23 (2013.01 - EP US); G09G 5/02 (2013.01 - EP US); G09G 2300/0434 (2013.01 - EP KR US); G09G 2300/08 (2013.01 - EP KR US); G09G 2310/06 (2013.01 - EP KR US); G09G 2310/061 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
US 2003070929 A1 20030417; US 7106297 B2 20060912; AT E335220 T1 20060815; CN 1308762 C 20070404; CN 1568442 A 20050119; DE 60213638 D1 20060914; DE 60213638 T2 20070329; EP 1438631 A1 20040721; EP 1438631 B1 20060802; GB 0124247 D0 20011128; JP 2005505021 A 20050217; KR 20040052224 A 20040622; TW I224767 B 20041201; WO 03032070 A1 20030417
DOCDB simple family (application)
US 24297002 A 20020913; AT 02765237 T 20020912; CN 02819944 A 20020912; DE 60213638 T 20020912; EP 02765237 A 20020912; GB 0124247 A 20011010; IB 0203752 W 20020912; JP 2003534980 A 20020912; KR 20047005085 A 20020912; TW 91121618 A 20020920